// 云函数入口文件
const cloud = require('wx-server-sdk')

cloud.init({
  env: cloud.DYNAMIC_CURRENT_ENV
})
const db = cloud.database()

// 云函数入口函数
exports.main = async(event, context) => {
  return await db.collection("registration").aggregate()
    .match({
      _id: event.id,
    }).lookup({
      from: 'address',
      localField: "address_id",
      foreignField: "_id",
      as: "address"
    }).end()
}